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Effect of temperature on α-tocopherol, fatty acid profile, and pigments of Diacronema vlkianum (Haptophyceae) |
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| Authors: | Y Durmaz M Donato M Monteiro L Gouveia M L Nunes T Gama Pereira ? Gökp?nar N M Bandarra |
| Institution: | 1. Department of Aquaculture, E.U. Fisheries Faculty, 35100, Bornova Izmir, Turkey 2. Dept. Inova??o Tecnológica e Valoriza??o dos Produtos da Pesca, Instituto de Investiga??o das Pescas e do Mar – IPIMAR, Av. Brasília, 1449-006, Lisboa, Portugal 3. Instituto Nacional de Engenharia e Tecnologia Industrial – INETI-DER – Unidade Biomassa, Estrada do Pa?o do Lumiar, Edifício G, 1649-038, Lisboa, Portugal |
| Abstract: | Diacronema vlkianum was grown in polyethylene bags at two different temperatures (18 and 26°C) in the laboratory. The biochemical composition level decreased when the temperature increased from 18 to 26°C. The maximum cell number at 18°C was 11.9 × 106 cells ml−1, while maximum cell number at 26°C was 1.6 × 106 cells ml−1. The maximum level of α-tocopherol was 257.7 ± 21.6 μg g−1 dry weight (DW) at 18°C. The highest total carotenoids and chlorophylls were 6.5 mg g−1 DW and 4.3 mg g−1 DW, respectively, and the main pigments were determined as astaxanthin and lutein. Polyunsaturated fatty acids were found to be the predominant group, reaching 39.5% of the total fatty acids at 18°C. This comprised 20:5(n − 3) as the main polyunsaturated fatty acids (20.4%, at 18°C) followed by 22:6(n − 3) (4.8%, at 18°C). The results suggest that D. vlkianum can be successfully used as feed in shellfish hatcheries or aquaculture hatcheries, either as a substitute or in association with other microalgae, when this algae is cultured at 18°C. |
| Keywords: | α -Tocopherol Diacronema vlkianum Fatty acids Pigment Temperature |
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